https://gcc.gnu.org/bugzilla/show_bug.cgi?id=96015
--- Comment #34 from Eric Botcazou <ebotcazou at gcc dot gnu.org> --- > Eric, thoughts? Another possibility would be to remove the problematic barriers during the barriers pass that is run just before reorg: /* Some old code expects exactly one BARRIER as the NEXT_INSN of a non-fallthru insn. This is not generally true, as multiple barriers may have crept in, or the BARRIER may be separated from the last real insn by one or more NOTEs. This simple pass moves barriers and removes duplicates so that the old code is happy. */ static unsigned int cleanup_barriers (void) but this may void the fix for PR rtl-optimization/81025. In the end I think that the safest route is indeed probably to patch the hot spot in relax_delay_slots. There is already a similar guard for text section switches by means of switch_text_sections_between_p. The condition would be LABEL_NUSES of JUMP_LABEL equal to 1 and presence of a BARRIER between the jump and next insns.
